Patents by Inventor Toshiharu Matsushima
Toshiharu Matsushima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10254599Abstract: According to an aspect, a liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, a first electrode, and a second electrode. The first electrode includes an electrode base portion extending in a first direction, and a plurality of comb tooth portions extending in a second direction different from the first direction and protruding from the electrode base portion with a certain distance interposed therebetween. At least one of the first substrate and the second substrate includes a light-blocking part that reduces intensity of light passing therethrough at a position overlapping with at least one of the center of the comb tooth portion and the center between the adjacent comb tooth portions in a direction perpendicular to the first substrate.Type: GrantFiled: December 22, 2016Date of Patent: April 9, 2019Assignee: Japan Display Inc.Inventor: Toshiharu Matsushima
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Publication number: 20190086734Abstract: According to one embodiment, a liquid crystal display device includes second substrates, a light-shielding layer, and a liquid crystal layer. The first substrate includes pixel electrodes, a common electrode, and subpixel areas each including area in which the pixel electrode is present and a second area in which the pixel electrode is not present. Each of the subpixel areas includes first and second sides. The first area includes an axial area and branch areas. The second area includes a gap area between the adjacent branch areas. The axial area includes a projection portion projecting to the second side and in alignment with the gap area, and overlaps the light-shielding layer.Type: ApplicationFiled: November 16, 2018Publication date: March 21, 2019Applicant: Japan Display Inc.Inventor: Toshiharu MATSUSHIMA
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Publication number: 20190072827Abstract: According to an aspect, a display device has a first electrode, a second electrode and liquid crystal layer. When a voltage is not applied to the first and second electrodes, the major axes of the liquid crystal molecules are oriented in a third direction. When a voltage is applied between the first and second electrodes, the major axes are oriented so as to rise in a direction perpendicular to a first substrate while rotating clockwise in a vicinity of one of long sides of comb tooth portion that face each other and counterclockwise in a vicinity of the other of the long sides. An angle between an electrode base-side portion of a long side of each comb tooth portions and the third direction is larger than an angle between a distal end-side portion of the long side of each comb tooth portions and the third direction.Type: ApplicationFiled: November 5, 2018Publication date: March 7, 2019Inventors: Hayato Kurasawa, Toshiharu Matsushima
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Patent number: 10222660Abstract: In this display device, an electrode layer for an upper electrode and a lower electrode is formed on an array substrate via a dielectric film, one of the upper electrode and the lower electrode is a pixel electrode, the other thereof is a common electrode, and an opening portion for generating horizontal electric field in a liquid crystal layer is formed in accordance with a shape of the electrode layer in a plan view. A CF substrate has a light-shielding film (BM) including a lateral BM portion. The opening portion has a plurality of slits in an X direction, and an end portion of an outermost slit in a Y direction is concealed by the lateral BM portion overlapped in a Z direction.Type: GrantFiled: June 20, 2016Date of Patent: March 5, 2019Assignee: JAPAN DISPLAY INC.Inventor: Toshiharu Matsushima
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Patent number: 10216024Abstract: The present display device includes a liquid crystal panel having a liquid crystal layer between an array substrate and a facing substrate. The array substrate has an electrode layer having an upper electrode and a lower electrode facing each other in a Z direction, and an opening including a plurality of slits extending in an X direction is formed in the upper electrode and the lower electrode. The liquid crystal layer is provided on the electrode layer, liquid crystal molecules in vicinity regions on one side and the other side of the opening which face each other in a width direction of each slit are oriented as rotating in reverse to each other, and the facing substrate has a conductive layer.Type: GrantFiled: July 26, 2017Date of Patent: February 26, 2019Assignee: Japan Display Inc.Inventor: Toshiharu Matsushima
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Patent number: 10216048Abstract: According to an aspect, a liquid-crystal display device includes a first substrate, a second substrate, and a liquid-crystal layer. The first substrate includes a first electrode and a second electrode, and one of the first electrode and the second electrode is a pixel electrode provide, the first electrode includes an electrode base portion extending in a first direction and comb tooth portions extending in a second direction and protruding in a comb teeth shape from the electrode base portion with a predetermined distance interposed therebetween, and adjacent comb tooth portions include adjacent comb tooth portions having a relation in which a first long side of one comb tooth portion closest to a boundary between pixels is not parallel to a first long side of the other comb tooth portion.Type: GrantFiled: January 23, 2017Date of Patent: February 26, 2019Assignee: JAPAN DISPLAY INC.Inventor: Toshiharu Matsushima
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Patent number: 10175537Abstract: According to one embodiment, a liquid crystal display device includes second substrates, a light-shielding layer, and a liquid crystal layer. The first substrate includes pixel electrodes, a common electrode, and subpixel areas each including area in which the pixel electrode is present and a second area in which the pixel electrode is not present. Each of the subpixel areas includes first and second sides. The first area includes an axial area and branch areas. The second area includes a gap area between the adjacent branch areas. The axial area includes a projection portion projecting to the second side and in alignment with the gap area, and overlaps the light-shielding layer.Type: GrantFiled: August 11, 2017Date of Patent: January 8, 2019Assignee: Japan Display Inc.Inventor: Toshiharu Matsushima
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Patent number: 10151952Abstract: According to an aspect, a display device has a first electrode, a second electrode and liquid crystal layer. When a voltage is not applied to the first and second electrodes, the major axes of the liquid crystal molecules are oriented in a third direction. When a voltage is applied between the first and second electrodes, the major axes are oriented so as to rise in a direction perpendicular to a first substrate while rotating clockwise in a vicinity of one of long sides of comb tooth portion that face each other and counterclockwise in a vicinity of the other of the long sides. An angle between an electrode base-side portion of a long side of each comb tooth portions and the third direction is larger than an angle between a distal end-side portion of the long side of each comb tooth portions and the third direction.Type: GrantFiled: March 9, 2018Date of Patent: December 11, 2018Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Toshiharu Matsushima
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Publication number: 20180341135Abstract: According to one embodiment, a first substrate includes a pixel electrode, a common electrode and a sub-pixel area including a first area and a second area. The first area includes an area where the pixel electrode exists, an axial area extending in a second direction, and branch areas extending from the axial area to a first side of the first direction. The second area includes an area where the pixel electrode does not exist, and a first gap area extending in the first direction, at a position between the adjacent branch areas. A maximum value of a first voltage applied to the pixel electrode in a first mode is higher than a maximum value of a second voltage applied to the pixel electrode in a second mode.Type: ApplicationFiled: April 18, 2018Publication date: November 29, 2018Applicant: Japan Display Inc.Inventors: Shunichi KIMURA, Toshiharu Matsushima
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Patent number: 10139684Abstract: A liquid crystal device includes a pair of substrates composed of an element substrate and a counter substrate and a liquid crystal layer that is held between the pair of substrates. In the liquid crystal device, a data line and a scanning line are provided on the element substrate in a manner to be orthogonal to each other, a plurality of pixels including a switching element are arranged in matrix, a first electrode and a second electrode are provided on the element substrate, an image signal potential is supplied to the first electrode via the switching element, a common potential is supplied to the second electrode, the second electrode includes a plurality of openings, and a width, in an alignment direction of the plurality of openings, of the opening positioned on an outermost side in the alignment direction is smaller than a width of the rest of the openings.Type: GrantFiled: March 23, 2016Date of Patent: November 27, 2018Assignee: Japan Display Inc.Inventor: Toshiharu Matsushima
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Publication number: 20180307089Abstract: According to one embodiment, a liquid crystal display device includes first and second substrates and a liquid crystal layer. The first substrate includes scanning lines, signal lines, first and second electrodes and a light-shielding layer. One of the first and second electrodes is a pixel electrode, and the other one is a common electrode. The first electrode includes branch areas and an axis area. A gap area is provided between the adjacent branch areas. The light-shielding layer includes first portions overlapping the branch area or the gap area. The first portions are arranged at a position closer to the liquid crystal layer than the scanning and signal lines in the first substrate.Type: ApplicationFiled: April 6, 2018Publication date: October 25, 2018Applicant: Japan Display Inc.Inventors: Koichi Igeta, Toshiharu Matsushima
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Patent number: 10061168Abstract: According to an aspect, a liquid crystal display device includes: a first substrate; a second substrate; a liquid crystal layer between the first and second substrates; pixels each including sub-pixels corresponding to different color areas; a first electrode in each sub-pixel; and a second electrode facing the first electrode. The first electrode includes an electrode base portion extending in a first direction; and a plurality of comb tooth portions extending in a second direction from the electrode base portion. A slit pitch of a sub-pixel in one color area and a slit pitch of a sub-pixel in the other color area of at least two color areas out of different color areas are different in size, each slit pitch corresponding to a gap between the comb tooth portions adjacent to each other.Type: GrantFiled: September 13, 2017Date of Patent: August 28, 2018Assignee: Japan Display Inc.Inventors: Toshiharu Matsushima, Keiji Takizawa, Toshinori Uehara
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Publication number: 20180240424Abstract: According to one embodiment, a display driver configured to control a display operation of an active-matrix display device, wherein the display device includes a display area in which liquid crystal pixels are arranged in a matrix form, a plurality of scanning lines arranged along rows, a plurality of signal lines arranged along columns, a plurality of switching elements arranged in the vicinities of positions at which the scanning lines and the signal lines intersect each other, and a backlight, and the display driver controls preparatory write of writing a signal of a predetermined gradation to the liquid crystal pixels, thereafter controls sequential write of an image signal to the liquid crystal pixels, and at the time after an elapse of a predetermined time from the preparatory write, makes the backlight light up.Type: ApplicationFiled: February 23, 2018Publication date: August 23, 2018Applicant: Japan Display Inc.Inventors: Yoshiro Aoki, Toshiharu Matsushima
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Publication number: 20180203306Abstract: In one embodiment, a liquid crystal display device comprises a first and second substrates and a liquid crystal layer. The first substrate comprises subpixels, first and second common electrodes, and a pixel electrode. Each of the subpixels comprises an axial area, branch areas, and gap areas. The second edge comprises concave portions. The axial and branch areas are areas in which the second common electrode is not present, and the pixel electrode is present. The gap areas are areas in which the second common electrode is present. The concave portions are areas in which the second common electrode and the pixel electrode are not present, and the first common electrode is present.Type: ApplicationFiled: December 20, 2017Publication date: July 19, 2018Applicant: Japan Display Inc.Inventor: Toshiharu MATSUSHIMA
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Publication number: 20180203310Abstract: According to one embodiment, a display device includes first and second substrates, and liquid crystal layer. The first substrate includes first and second electrodes. The second electrode includes comblike electrodes extending in parallel to a first direction and tapered toward tips thereof, and a connecting portion which connects the comblike electrodes. An initial alignment direction is parallel to the first direction or a direction orthogonal to the first direction. The comblike electrode includes a first part having sides each form a first angle with the first direction, and a second part having sides each form a second angle with the first direction, the second angle being greater than the first angle.Type: ApplicationFiled: March 15, 2018Publication date: July 19, 2018Applicant: Japan Display Inc.Inventor: Toshiharu MATSUSHIMA
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Publication number: 20180196319Abstract: According to an aspect, a display device has a first electrode, a second electrode and liquid crystal layer. When a voltage is not applied to the first and second electrodes, the major axes of the liquid crystal molecules are oriented in a third direction. When a voltage is applied between the first and second electrodes, the major axes are oriented so as to rise in a direction perpendicular to a first substrate while rotating clockwise in a vicinity of one of long sides of comb tooth portion that face each other and counterclockwise in a vicinity of the other of the long sides. An angle between an electrode base-side portion of a long side of each comb tooth portions and the third direction is larger than an angle between a distal end-side portion of the long side of each comb tooth portions and the third direction.Type: ApplicationFiled: March 9, 2018Publication date: July 12, 2018Inventors: Hayato Kurasawa, Toshiharu Matsushima
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Patent number: 10007162Abstract: A liquid crystal display device comprises a first substrate and a liquid crystal layer. The substrate includes a pixel electrode and sub-pixel areas including a first area and a second area. The first area is an area where the pixel electrode exists, the second area is an area where the pixel electrode does not exist. The first area includes first and second main areas. The second area includes a first gap area extending in a second direction, between the first and second main areas. The first gap area includes first and second end parts in the second direction, and a central part between the first and second end parts. A width of the first gap area in the first direction is greater at the central part than at any one of the first end part and the second end part.Type: GrantFiled: March 1, 2017Date of Patent: June 26, 2018Assignee: Japan Display Inc.Inventor: Toshiharu Matsushima
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Publication number: 20180164646Abstract: A liquid crystal display device according to an aspect of the present invention includes a first substrate including a pixel electrode and a common electrode, a second substrate opposed to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The pixel or common electrode includes, in a single subpixel, belt-like portions arranged in a first direction, and coupling portions coupling the adjacent belt-like portions. Each belt-like portion continuously extends from one side to an other side of a central line of the subpixel, that is parallel with the first direction. The coupling portions include one or more first coupling portions provided on the one side of the central line, and one or more second coupling portions provided on the other side of the central line.Type: ApplicationFiled: February 8, 2018Publication date: June 14, 2018Inventors: Toshiharu Matsushima, Daichi Suzuki
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Publication number: 20180129103Abstract: According to one embodiment, a display device includes a first substrate with a first alignment film, a second substrate with a second alignment film, and a liquid crystal layer interposed therebetween. The first substrate has first and second electrodes. An initial alignment direction of liquid crystal molecules of the liquid crystal layer is parallel to a first direction or a direction orthogonal to the first direction. The second electrode includes comblike electrodes extending parallel to the first direction and a connecting portion which connects the comblike electrodes. The connecting portion includes a projection which projects in a second direction more than an outermost comblike electrode.Type: ApplicationFiled: January 10, 2018Publication date: May 10, 2018Applicant: Japan Display Inc.Inventor: Toshiharu MATSUSHIMA
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Publication number: 20180129097Abstract: According to an aspect, a liquid crystal display device includes a first substrate; a second substrate arranged to be opposed to the first substrate; a liquid crystal layer arranged between the first substrate and the second substrate; a first electrode arranged for each of a plurality of pixels that are arranged in a matrix; a second electrode arranged at a position opposed to the first electrode; a plurality of first areas in which light transmission is suppressed between the first substrate and the second substrate, the first areas extending in at least one direction to traverse the pixels; and a second area in which liquid crystal molecules in the liquid crystal layer are rotated according to an electric field acting between the first electrode and the second electrode, the second area being sandwiched between the first areas.Type: ApplicationFiled: January 4, 2018Publication date: May 10, 2018Inventor: Toshiharu MATSUSHIMA
